High Voltage Shock Hazard
Keysight B2985B/B2987B can apply dangerous voltages (1050 V) at the High/Low terminal.
To prevent electric shock hazard, the following safety precautions must be observed during the
use of Keysight B2985B/B2987B.
• Use a three-conductor AC power cable to appliance coupler (inlet) and the instrument to an
electric ground (safety ground).
• Prepare shielding box which covers interface to a device under test and equipped with
interlock circuit that opens when the door is opened.
• Before performing measurement, connect the interlock circuit to the Interlock terminal of
this instrument.
• Confirm periodically that the interlock function works normally.
• Before touching the connections of the High/Low terminal, turn the instrument off and
discharge any capacitors of the measurement path. If you do not turn the instrument off,
complete “all” of the following items, regardless of any instrument’s settings.
• Terminate source output by pressing the On/Off switch, confirm that the On/Off switch
turns off.
• Confirm that the HV (high voltage) status indicator is not lit.
• Open the shielding box access door (open the Interlock terminal).
• Discharge any capacitors if the capacitance is connected to this instrument.
• Warn workers in the vicinity of the instrument about hazardous conditions.
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